Name Info Provider Link
subscription/membership/fee required Ingenta plc https://www.ingentaconnect.com/openurl?genre=article&issn=&volume=40&issue=1&spage=11&aulast=El-Khayat
Hepatitis B free resource MedlinePlus Health Information https://medlineplus.gov/hepatitisb.html
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=32925546.ui
subscription/membership/fee required Wolters Kluwer https://doi.org/10.1097/INF.0000000000002894